App closes the moment I open it

When I open my game it stays open for few seconds then it closes ...it happens mostly when I am on a server or on the title menu screen...I tried to find fixes by clearing cache but nothing seems to work....need assistance on this because I can't play Minecraft PE now...My device is POCOPHONE F1 BY XIAOMI: 6 GB RAM : 64 GB ROM VARIENT : RUNNING ANDROID 9 PIE WITH MIUI 10.1